a(n) = 3^n reduced modulo 2^n.

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =1a(5) =19a(6) =25a(7) =11a(8) =161a(9) =227a(10) =681a(11) =1019a(12) =3057a(13) =5075a(14) =15225a(15) =29291a(16) =55105a(17) =34243a(18) =233801a(19) =439259a(20) =269201a(21) =1856179a(22) =3471385a(23) =6219851a(24) =1882337a(25) =5647011a(26) =50495465a(27) =17268667a(28) =186023729a(29) =21200275